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首页> 外文期刊>Journal of Propulsion and Power >Determining Vacuum-Arc Thruster Performance Using a Cathode-Spot Model
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Determining Vacuum-Arc Thruster Performance Using a Cathode-Spot Model

机译：使用阴极点模型确定真空电弧推力器性能

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A simple model of the vacuum-arc cathode-spot and plasma region was developed to predict the performance ofnvacuum-arc thrusters operating roughly in the arc current range 80–300 A with thrust pulses u0001 250 u0001s. Thenconventional-based cathode-spot model predicts ion current, average ion velocity, and erosion rate to establishnthruster performance. Vacuum-arc properties for a range of materials (Al, Ti, Cr, Fe, Ni, Cu, Ag, Pb, Bi) werendetermined as well as maximum arc spot currents for Ti, Cr, Fe, Ni, and Bi. Model results generally show goodnagreement with published data and predicted thruster performance is comparable to literature. Most values ofnion-to-arc current ratio were within 10% of published experimental data, ion velocities within about 30%, andnerosion rates were within roughly 50%, provided macroparticle ejection was low. The crucial role of the ion-to-arcncurrent ratio on thruster performance is assessed.
机译：建立了真空电弧阴极点和等离子体区域的简单模型，以预测在大约80–300 A电弧电流范围内，推力脉冲为u0001 250 u0001s的真空电弧推力器的性能。然后基于常规的阴极斑点模型预测离子电流，平均离子速度和腐蚀速率以建立推进器性能。确定了一系列材料（Al，Ti，Cr，Fe，Ni，Cu，Ag，Pb，Bi）的真空电弧特性以及Ti，Cr，Fe，Ni和Bi的最大电弧点电流。模型结果通常显示出与已公开数据的良好一致性，并且预测的推进器性能与文献相当。如果大颗粒喷射很低，大多数的离子-电弧电流比值在已发表的实验数据的10％以内，离子速度在30％左右，神经衰弱率在50％左右。评估了离子与电弧电流比对推进器性能的关键作用。

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